<let/value = "b"/>
<const/tag = "select"/>
<${tag ? "select" : {}} ...{ value, valueChange(v) { value=v } }>
  <option ...{ value:"a" }>A</option>
  <option ...{ value:"b" }>B</option>
  <option ...{ value:"c" }>C</option>
</>
<span>${value}</span>